Device for closing and opening curtains

ABSTRACT

A device for closing and opening curtains, which are movable along a rod ( 1 ), said rod near its ends being provided with a means for limiting the movement of said curtains. The rod ( 1 ) is provided with channels ( 2 ) in which an endless toothed belt ( 3 ) is received which at the ends of said rod ( 1 ) is guided by toothed wheels ( 7,13 ) from which one can be driven. Said toothed belt ( 3 ) is provided with at least one carrier ( 4 ) which can be connected to a curtain and can extend it self downwards through a slot ( 5 ) in said rod ( 1 ). A connector element ( 11 ) is provided which is connected to the rod ( 1 ) and extends substantially in line with this and comprises a sideways extending housing ( 10 ), in which said drivable toothed wheel ( 7 ) is present. The driving of said toothed wheel ( 7 ) takes place by means of an electric motor ( 9 ), which can be operated by means of a hand switch either by means of a time switch either by means of a light sensor.

The invention relates to a device for closing and opening curtains, which are movable along a rod, said rod near its ends being provided with a means for limiting the movement of said curtains.

In many cases such a device is formed by cords extending along said rod and being guided by rollers. At least at one end of said rod the cords either one cord is running downwards so that the system can be manual operated for closing and opening said curtains.

Such a device might fail by the fact that the cords might be entangled and also might go to wear off.

Now the object of the invention is to provide a device which is having a simple construction and which can be operated in a simple way too.

According to the invention the device comprises a rod provided with channels in which an endless toothed belt can be received which at both ends of said rod is guided by toothed wheels from which one can be driven, said belt being provided with at least one carrier which can be connected to a curtain and can extend it self downwards through a slot in said rod.

In connection with the necessary driving the endless toothed belt can be curved away out of said channels near at least one of both ends of said rod and can be guided over said toothed wheel which can be driven.

When only one curtain has to be moved one carrier will suffice. In many cases two curtains have to be moved towards and away from each other. In that case each part of said toothed belt will have been provided with a carrier.

According to an embodiment of the invention a connector element is provided which is connected to the rod and extends substantially in line with this and comprises a sideways extending housing, in which said drivable toothed wheel is present.

The housing will extend it self substantially vertical downwards and, as seen in top view, it will be present beside said rod. Possibly it might be used also for connecting said rod to a part of the construction of a building.

In particular the driving of said toothed wheel will take place by means of an electric motor, which can be operated by means of a hand switch or in another way.

Said electric motor can also be operated by means of a time switch either by means of a sensor sensing the amount of light near said sensor, an electronic circuit being provided between said sensor and said switch.

In this way it can be obtained, that said curtain is closed and opened again at a given point of time either during a given period of the day. By this it will not be clear for the environment that no persons are present in the related apartment.

When a sensor is used said electronic circuit can be executed such, that after operating said switch a next operation can only take place after a given period.

By this it can be prevented that in case if a varying elucidation of the sensor, as in case of varying clouds, the curtains should be operated shortly after each other, so e.g. being closed and shortly after this being opened again.

Nevertheless the hand switch can be used also when one want to close or open the curtains at other points of time. In that case the other means might be switched off for some time.

The invention is further elucidated with the help of an embodiment, shown in the accompanying drawing, in which:

FIG. 1 shows a perspective view of a device according to the invention, as seen at an oblique angle from below;

FIG. 2 shows a cross section over the line II-II of FIG. 1 of only the rod and the toothed belt present in it;

FIG. 3 shows a perspective view of a part of the device of FIG. 1 but seen from another angle; and

FIG. 4 schematically shows a top view of the device of FIG. 1, in which some parts are omitted for showing details.

As shown in the figures the device comprises a rod 1, the cross section of which is particular shown in FIG. 2. As appears from this the rod comprises, among others, two channels 2 lying beside each other, in which is received an endless toothed belt 3, in particular shown in FIG. 4.

The endless belt 3 can be fabricated as such. In particular, however, it will be formed by a piece of toothed belt from which the ends are connected to each other by a connector, forming part of a carrier 4, see the FIGS. 1 and 3. The carrier 4 is having a not further indicated forerunner.

In this way the desired length of the circumference of the toothed belt can be simply obtained and can be adapted to the length of the used rod.

When two curtains, not further shown, have to be moved said toothed belt might comprise two parts, which are connected to each other by means of two connectors, each forming a part of a carrier 4.

The carriers 4, together with the forerunners, extend downwards from the connector part through the slot 5 of the rod 1, said rod further being provided with the slot 6 serving for receiving not shown means by which said rod might be connected to a ceiling or a wall.

As in particular shown in FIG. 4 near one end of the rod 1 the toothed belt 3 is running out of said channels 2 towards a toothed wheel 7, fixedly connected to the shaft 8. The shaft 8 might be driven by means of an electric motor 9, received in a housing 10 which, in view of the mounting of the various parts, will be provided with a removable lid. In FIG. 4 this lid is omitted for showing the course of the toothed belt 3 over said toothed wheel 7.

Possibly a transformer can be present in said housing 10 for delivery of current to said electric motor 9 with a voltage lower than that of the network.

The housing 10 might form part of a connector element 11, which can be connected to the rod 1, as by not shown parts which might engage one another and if necessary by other connecting elements. A closing part 12 might be connected to said connector element 11. Such a closing part 12 might also be mounted at the other end of said rod 1.

As shown in the FIGS. 3 and 4 near said end of the rod said toothed belt 3 is guided over a toothed wheel 13, positioned inside said rod 1. It is not necessary to drive this toothed wheel 13. Obviously it is possible to mount said toothed wheel 13 in the same way as said toothed wheel 7, said wheel then being loosly rotatable on a shaft.

Further said housing 10 is provided with end switches 14 and with a current supply conduct 15 for supplying current to the electric motor 9. In the conduct 15 a hand switch can be mounted and possible a time switch either a light sensor as mentioned above.

It will be obvious that only one possible embodiment of a device according to the invention is shown in the drawing and is described above and that many modifications can be applied without leaving the inventive idea, as this is indicated in the claims. 

1. A device for closing and opening curtains, which are movable along a rod, said rod near its ends being provided with a means for limiting the movement of said curtains, characterized in that the device comprises a rod provided with channels in which an endless toothed belt is received which at both ends of said rod is guided by toothed wheels from which one can be driven, said toothed belt is provided with at least one carrier which can be connected to a curtain and can extend it self downwards through a slot in said rod.
 2. A device according to claim 1, wherein the endless toothed belt is curved away out of said channels near at least one of both ends of said rod and is guided over said toothed wheel which can be driven.
 3. A device according to claim 2, wherein a connector element is provided which is connected to the rod and extends substantially in line therewith and comprises a sideways extending housing, in which said drivable toothed wheel is present.
 4. A device according to claim 1, wherein the driving of said toothed wheel takes place by means of an electric motor, which can be operated by means of a hand switch or in another way.
 5. A device according to claim 4, wherein said electric motor is operated by means of a time switch or by means of a sensor sensing the amount of light near said sensor.
 6. A device according to claim 1, wherein said endless belt is formed by a piece of toothed belt from which the ends are connected to each other by a connector forming part of the carrier. 